3a+a+2=18

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Solution for 3a+a+2=18 equation: 


Simplifying
3a + a + 2 = 18

Reorder the terms:
2 + 3a + a = 18

Combine like terms: 3a + a = 4a
2 + 4a = 18

Solving
2 + 4a = 18

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-2' to each side of the equation.
2 + -2 + 4a = 18 + -2

Combine like terms: 2 + -2 = 0
0 + 4a = 18 + -2
4a = 18 + -2

Combine like terms: 18 + -2 = 16
4a = 16

Divide each side by '4'.
a = 4

Simplifying
a = 4

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